{ inputs, ... }:
let
  defaultOverlays =
    # execute and import all overlay files in the current
    # directory with the given args
    builtins.map
      # execute and import the overlay file
      (f: (import (./. + "/${f}") { inherit inputs; }))
      # find all overlay files in the current directory
      (builtins.filter (f: f != "default.nix") (builtins.attrNames (builtins.readDir ./.)));
in
{
  nixpkgs.overlays = defaultOverlays ++ [
    (final: _prev: {
      stable = import inputs.stable {
        system = final.system;
        config.allowUnfree = true;
      };
    })
  ];
}